Weft-detector mechanism



Jufiy 24, 1923.

2 Sheets-Sheet 1 c. E. KNOWLTON ET AL WEFT DETECTOR MECHANISM Filed June 5, 1920 I a W July 24, 1923.

C. E. KNOWLTON ET AL WEFT DETECTOR MECHANISM 2 Sheets-Sheet 2 Filed June 3, 1920 Patented July 24, 1923.

UNHT TTS PATENT @FFHQE.

CHARLES E. KNOWLTON, OF NORTH GRAFTON, AND EPPA H. RYON, OF WALTHAM,

MASSACHUSETTS, ASSIGNORS TO CROMPTON &. KNOWLES LOOM WORKS, OF WORCES- TER, MASSACHUSETTS, A CORPORATION MASSACHUSETTS.

WEFT-DETECTOR MECHANISM.

Application filed June 3,

To all whom it may concern:

Be it known that we, CHARLES E. KNOWL- TON and EPPA H. RYoN, both citizens of the United States, the said KNOWLTON residing at North Grafton, in the county of Worcester, State of Massachusetts, and the said RYoN residing at Waltham, county of Middlesex, and State of Massachusetts, have invented a new and useful Weft-Detector Mechanism,

of which the following is a specification.

This invention relates to a weft detecting mechanism for looms of the type commonly known as side slip detectors.

Such detectors are mounted for both longitudinal or forward movement and also for angular movement, the latter movement or slip occurring when the weft carrier is substantially exhausted and there is not sufficient weft remaining on the weft carrier to hold the serrated end of the detector.

It is the general object of our invention to adapt this type of weft detector for use on the magazine end of a loom by providing improved devices for withdrawing the detector from the shuttle during each transfer operation.

Our invention further relates to arrangements and combinations of parts hereinafter described and more particularly pointed out in the appended claims.

A preferred form of our invention is shown in the drawings in which Fig. 1 is a front elevation of a portion of a loom to which our invention has been applied.

. Fig. 2 is a plan view of our improved detecting mechanism;

Fig. 3 is a left-hand sectional elevation taken along the line 33 in Fig. 2; and

Fig. 4 is a detail rear elevation taken along the line 44 in Fig. 2, the detector being shown in section.

Referring to the drawings, we have shown a portion of a loom side 10, a breast-beam 11, a magazine frame 12, and a transferrer 13 pivotally mounted on a stud 14 fixed in the frame 12.

We have also shown an actuator for the magazine mechanism, comprising a vertically movable rod or plunger 15 and a lever 16 pivotally connected at 17 to a rod or link 18 forming. a connection to the magazine mechanism. The rod 15 is reciprocated ver tiwlly at g rintervals andthe lever 16 1920. Serial No. 386,303.

16 as the latter descends, further movement of the free end of the lever is prevented and the link 18 is drawn downward to operate the magazine mechanism.

The parts thus far described are of a usual type and form no part of our inven tion. For a more complete description thereof, reference is made to the prior patent to Ryon, No. 972,722, dated October 11, 1910.

A stand or plate 21 (Fig. 2) is adjustably secured to a bracket 22, (Fig. 1) which in turn is adjustably secured to a second bracket 23 bolted to an arm24 fixed. to the loom side 10. b

A detector 25 (Fig. 2) is mounted in horizontal position on the stand 21, the front end of the detector extending freely through a swivel bearing block 26 rotatably mounted near the front edge of the plate 21. The rear portion of the detector 25 extends through a recessed link 27 and through a wide opening 21 in the upwardly flanged rear end of the stand 21, and is provided with a flattened serrated weft engaging end. A light coil spring 28 surrounds the detector 25 and is interposed between the bearing 26 and a cross arm 30 threaded on the detector 25 and locked in position by a nut 31.

These detector parts are or may be similar to the construction shown in the patent to Sti-mpson, No. 1,327,788, dated January 13, 1920.

A bell crank 32 is pivoted at 33 to the stand 21, the rearwardly extending arm 32 of the bell crank 32 having a pin and slot connection with the recessed link 27 through which the rear portion of the detector 25 extends. The short arm 32 of the bell crank 32 is provided with an extension 34: supportin a swivel block 35 (Fig. 3) in which the rod 20 is adjustably secured by a screw 36.

A plate 37 (Fig. 3) is connected to the downwardly extending arm 13 of the transferrer 13 by a headed stud 38 (Fig. 1), which also forms a pivotal connection for the latch 39 through which the transferrer is actuated. The plate 37 extends rearwardly from the stud 38 and slides between plates 40 and 41 (Fig. 4), secured to the rear end of the stand 21. A slot or opening 42 is provided to receive the end of the cross arm 30 on the detector 25.

A lug or projection on the under side of the cross arm 30 engages an oblique cam surface 43 (Fig. 2) of the stand 21 and thus yieldingly positions the detector normally at the left hand end of the rear opening 21 in the stand 21. The normal position of the detector 25 is shown in full lines in Fig. 2.

When the detector engages a weft carrier having a sufficient supply of weft thereon, the detector is moved directly forward, sliding through its bearing 26 and producing no movement of the "recessed link 27. The slot 42 in the plate 37 is of sufiicient length to permit corresponding free forward movement of the cross arm 30. When, however, the detector engages a substantially exhausted weft carrier, the detector slips sidewise to the position shown in dotted lines in Fig. 2, moving the link 27 and the bell crank 32 to the dotted line positions also shown in Fig. 2 and projecting the rod 20 into the path of the actuator lever 16, thus calling or indicating a transfer. When the transferrer 13 is thereafter actuated to complete the transfer, the plate 37 is moved forward and through the cross arm '30 also moves the detector 25 forward, withdrawing the same from the shuttle during the insertion of the fresh weft carrier.

It is immaterial in the operation of our device whether the transfer occurs on the same pick in which weft exhaustion is indicated or at a later period, as the detector is always withdrawn whenever transfer may occur.

Having thus described our invention, it will be evident that changes and modifications can be made therein by those skilled in the art within the spirit and scope of our invention as set forth in the claims and we do not wish-to be otherwise limited to the details herein disclosed, but what we claim 1s:--

1. In a loom, a weft detecting mechanism comprising a stand, a'weft detector mounted for both longitudinal and angular movement on said stand, a recessed link through which said detector extends, an actuator lever, a rod movable into and out of the path of said lever to render the latter operative or inoperative, and a bell crank to which said rod and said link are both directly connected, said crank being mounted on said stand adjacent said detector and being movable in a horizontal plane through said link by said detector to move said rod across the path of said actuator and thereby change the axis of movement of said actuator when said detector is moved angularly by engagement with a substantially exhausted weft carrier.

2. In a loom having a shuttle, in combination, a side slip weft detector mounted for both longitudinal and angular movement on said loom, a transferrer effective to insert a fresh weft carrier in the shuttle, and a connection from said transferrer to said detector through which said transferrer is effective to engage said detector at each trans fer operation in any angular position of said detector and to withdraw said detector from the path of movement of the incoming weft carrier, said detector being otherwise free from said transferrer for angular or longitudinal movement in said loom.

3. In a loom, a side slip weft detector, a transferrer, and a slotted plate connected to said transferrer and movable forward as said transferrer descends, said detector having a portion extending into the slot of said plate b which the late is effective to withdraw e detector rom the shuttle at each transfer operation.

In testimony whereof we have hereunto affixed our signatures.

CHARLES E. KNOWLTON. EPPA H. RYON. 

